Water-tube boiler.



N0. 637.6i7. Patented Nov. 2,18%. P. J. KEENE.

WATER TUBE BOILER.

(Application filed Mar. 6, 1899.- (No Model. 5 Sheets-Sheet I.

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No. 637,6l7. Patented Nov. 2|, I899.

P. J. KEENE.

WATER TUBE BOILER. (Application filed mm. 6. 1899.)

(No Model.) 5 Sheets--Sheet 2.

No. 637,6!7. Patented Nov. 2 l, I899.

P. J. KEENE.

WATER TUBE BOILER.

(Application filed Mar. 6, 1899.]

(No Model.) 5 Sheets-Sheet 3.

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No. 637,6l7. Patented Nov. 2|, I899. P. J. KEENE.

WATER TUBE BOILER.

(Application filed Mar. 6, 1899.) (No Model.) 5 Sheets-Sheet 4.

7 No. 637,617. Patented w Nov. :21; 1899..

P. .1. KEENE.

WATER TUBE BOILER.

(Application filed Mar. 6, 1899.! (No Model) 5 $heVef's -$\:I1eet .5.

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UNITED STAT PATENT OFFICE.

PHILIP J. KEENE, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO GEORGE J.ROCKWELL, OF SAME PLACE.

WATER-TUBE BOILER.

SPECIFICATION forming part Of Letters Patent NO. 637,617, dated November21, 1899.

Application filed time; 6, 1 899. Serial No. 707,991. (No model.)

T0 at whom it may concern.-

Be it known that I, PHILIP J. KEENE, a citizen of the United States ofAmerica, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inWater-Tube Boilers, of which the following is aspecification.

My invention relates to an improvement in water-tube boilers.

The obj ectis to provide a boiler of the character named having a largegrate area and a large heating-surface.

Another object is to provide a compact wator-tube boiler especiallyapplicable to eflicient service as a marine boiler, as well as for otherpurposes.

Another object is to provide a boiler of such construction that itsvarious parts are readily accessible both in the construction and repairof the boiler. In other words, it is my purpose to construct the drumsof this boiler of such size as not to be detrimental to high pressureand yet of a size to allow easy access for all necessary purposes, thusovercoming an objection to many other boilers in whichthe parts are ofsuch size as to render them inaccessible.

A still further object is to provide a boiler in which the lower drum isof a large size to permit the deposit of sediment without its ca pacitybeing materially lessened, as would be the case by the circulationthrough a small drum. Again, by providing a large drum a free and easyflow .of the sediment results along the bottom of the drum toward theblow-off pipe at the back.

WVith the foregoing objects in View myinvention consists, in themain,ofacentraldrum around which are grouped several other drums intriangular relation to one another, said drums being properly connectedtogether by water-tubes in connection with a fire-box on either side ofone drum, whereby the heat therefrom is applied directly to all thedrums in the triangle and the tubes extending from the lower drum.

The invention also consists of two upper drums, one central drum, andone lower drum, all connected by tubes, the said drums being surroundedby a steel or other metal casing lined with a non-combustible material.

It still further consists of a centrally-arranged lower drum, two upperdrums, the three being in triangular relation to one another,and acentral drum, in combination with tubes connecting these drums.Fire-boxes are placed on each side of the lower drum, whereby the heattherefrom radiates in and around the entire tube and drum construction.

The invention also consists in two upper, one lower, and one centraldrum connected together by suitable tubes, certain of the tubesextending from the upper drums to the central drum not being submerged,so that they are utilized as superheating steam-surfaces.

Finally, the invention consists in certain other novel features ofconstruction and combinations of parts, which will be more fullydescribed hereinafter and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a View in front elevation.Fig. 2 is a similar View with the front removed, showing the interiorconstruction. Fig. 3 is a longitudinal sectional view. Fig. 4 is a rearelevation with part of easing removed, showing heater-coils. Fig. 5 is adetail of the circulating arrangement of the heater-coils. While Fig. 4shows this arrangement on one side only, it will be understood that itcan be applied to one or both sides, as desired. Fig. 6 shows anexterior side elevation. A represents the outer'casing or housing, whichis preferably composed of a steel front, rear, and side plates, the saidplates being securely bolted or riveted, as shown. These several partsof the casin g or housing are lined with non-combustible material-suchas asbestos, for example, or the like. Doors and manholes are providedin the usual manner for affording access to the interior.

Referring to the interior construction, 13 represents a lower water-drumwhich extends from the front nearly to the rear of the easin g orhousing. For conveniencein construction this drum rests uponwrought-iron supports or steel stands 1 1. On each side of this lowerdrum tiling 2 2 is provided, as shown in Fig. 2 of the drawings. Aboveand parallel with this lower drum B is the central drum C. This centraldrum C is usually shorter than the lower drum, as indicated in Fig. 3.The two communicate with each other through the water-legs 3 3.

lation to the lower drum being triangular, as indicated in Figs. 1 and2.

they being diagonally disposed, as indicated;

and as would naturally be the condition in pipe extending through theheads of these drums inwardly and horizontally for somedistance and theupper surfaces of that portion on the ash pans or pits.

at the outer sides of fire-boxes, between the 1 of the pipes inside ofthe drums being perforated to serve as dry pipes or steam-separators,their location being of course in the steam-space above the water-level,thus taking the place of steam domes or'drums of ordinary boilers. Thenumerals-8 8 indicate water-glasses, one being provided for each ofthese upper drums D D, as shown in Figs. 1, 2, and 3.

There are two grates 9 9, one on each side of the lower drum B, andbeneath them are the ash pans or pits 1O 10. As a convenient means forsupporting the tiling 2 2 the Z-bars 11 11 are employed, theybeingattached to the sides of the wrought-iron supports or steel stands 1 1for holding or supporting the tiling. Angle-bars 12 12 formstiffening-rings grates and casing, supported by Z-bars attached tosides of casing, as shown in Fig. 2.

which connect said drums is the tiling 13 13, and extending horizontallyfrom the central drum to. the tiling 13 13 is the tiling 14.

By means of these tilings spaces 15 and 16 are formed above and belowthe tiling 14, respectively, and the spaces 15 are practically sealed inthe rear by tiling in order to prevent the gases finding an easy escapeto the chimney without passing over and around the tubes and 6, and itwill be observed that the tubes 5 5 form a wall over the spaces .15. Inthe rear not only are the spaces 15 15 closed, but also there is tilingunder the upper drums D D from drum to drum, as at 17,

to prevent the gases from having a direct passage from the grates up thestack without returning to the front through the'passages or spaces 1616. Thus it will be observed that the tiling seals the back chamber 18completely at thetop, compelling the gases to go 3 D D indicate the twoupper drums, their re- Water-tubes 4 4 I connect these upper drums tothe lower drum,

There is also tiling throughthe passages or spaces 16 16 toward thefront, as just explained, andto return through the spaces 15to'the-stack l9.

O'irculaiion;-The products of combustion 'from'the two grates passupward and toward the rear of the boiler beneath the'tiling 13 13,

thence returning to the front through the spaces -16 16 under the tiling14 14 until they reach the front of the furnace, when they re turn from.that point over the tiling 14 14,

passing around and between the upper banks of tubes 5 and 6 to the backof the boiler and finally passing out through the stack. The

circulation of the water through the drums and tubes is indicated by thearrows. The water ascends from the lower drum B through the tubes 4 4 tothe upperdrums D D, then returning downward to the central orintermediate drum, and from there through the legs to the lower drum,and so on continuously, steam being accumulated in the upper portion ofthe drums D D. The steam generated in the lower drum, central orintermediate drum, and water-legs connecting these drums will find aproper and easy escape through the upper tubes 6, which, it will beremembered, are unsubmerged, theyopehing directly into the steam-spacesof the two upper drums.

.Feed-waterheater.The pipe 20 for supplying feed-water (shown at theleft in Fig. 1) preferably extends from front to rear of the boiler andoutside of the boiler-casing, it having a valve 21 at the forward endwithin easy reach. This pipe enters the casing at point 22, as shown inFig. 3, at the .back of the boiler. It then passes upward in a zigzag orcircuitous route, forming the outer row of coils or those lying next tothe casing all the I way up from this point to the top of the boiler,

at which pointthe pipe crosses overand comes downward, forming an innerrow, the several rows interlocking each other and making a practicallysolid water-back. The object of these coils is not only to heat thefeed-water, Extending upward from the lower drum to 1 the upper drumsjust inside of the tubes but also to protect the back of the casing orhousing from intense heat. At the extreme upper end of this-feed-watercoil a pipe 23 extends from the coilroutside of the casing anddischarges into one or both of the upper drums D, and this pipe or pipes23 are provided with a valve or valves 24. .When not feeding water intothe boiler, the valve or valves 24 are to be kept open, so that thereshall be a circulation between the upper and lower drums through thecoils of the feedwater heater. When water is being fed into .the boilerthrough the heater coils, these pipes 23 and valves 24 at the-extremeupper end of the heater-coils connecting the latter tothe upper drum ordrums there would be practically no circulation through the heatercoilswhen water was not being fed into the boiler, in which case the smallquantity of watenccntained in the coils might possibly become exhaustedor forced downwardly through the coils into the lower dru m, therebyexposing the heater-coils to intense heat, with the liability of theirburning out. A blowoff pipe 25 leads out of the lower drum and isprovided with a valve 26, and the feed-water pipe preferably terminatesdownwardly just above this blow-off pipe.

It may be said in conclusion that the construction and disposition ofthe parts of the boiler are such that a maximum of heatingsurface isexposed, and at the same time the products of combustion are to a largeextent concentrated and brought directly into contact with this maximumarea of surface. In like manner it is obvious that the various parts arecompactly assembled, so that the boiler is of comparatively small sizein comparison with its extensive area of heating-surface andgrate-surface. Mention has already been made of the facility with whichaccess may be gained to the interior, the large grate area, and numerousother features of superiority, and hence furtherallusion to them neednot be made.

It is evident that slight changes might be resorted to in the form andarrangement of the several parts described without departing from thespirit and scope of my invention, and hence I do not wish to be limitedto the precise construction herein set forth; but

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, isl 1. In a water-tube boiler, the combinationwith a central or intermediate drum, of a series of drums in triangularrelation with one another around. this intermediate drum water-tubesconnecting the drums, a portion of said tubes being submerged and aportion above the water-level.

2. In a water-tube boiler, the combination with a central orintermediate drum and outside drums in triangular relation with respectto one another, of tubes connecting said drums and a pair of grates oneitherside of the median line of the furnace, whereby all of the drumsin triangular relation are exposed to the products of combustion.

3. In a water-tube boiler, the combination with a central orintermediate drum and outside drums in triangular relation with respectto one another, of tubes connecting said drums and a pair of grates oneither side of the median line of the furnace, whereby all of the drumsin triangular relation and the tubes connecting the outer drums directlytogether are exposed to the products of combustion.

at. In a water-tube boiler, the combination with a central orintermediate drum and three outer drums and water-tubes connecting allfour drums, of combustion-chambers placed on each side of one of thedrums.

5. In a water-tube boiler, the combination with acentral or intermediatedrum and three outer drums, and water-tubes connecting all four drums,of combustion-chambers placed on each side of one of the drums and anouter casing lined with non-combustible material.

6. In a water-tube boiler, the combination with a central orintermediate drum and three outer drums in triangular relation withrespect to one another, of tubes connecting the drums together certainof said tubes being above the water-level, of a main steam-pipeextending into the steam-space of the two upper drums, a portion of saidsteam-pipe inside of the drums being perforated on their upper surface,whereby to act as dry pipes or steam-separators.

7. In a water-tube boiler, the combination with a central orintermediate drum, alower drum beneath the latter and two upper drumsarranged above and at either side of the central or intermediate drum,the three outer drums in triangular relation one with another, ofwater-tubes extending from the two upper drums to the lower drum andfrom the two upper drums to the central or intermediate drum.

8. In a water-tube boiler, the combination with a central orintermediate drum, a lower drum beneath the latter and two upper drumsarranged above and at either side of the central or intermediate drum,the three outer drums in triangular relation one with another, ofwater-tubes extending from the two upper drums to the lower drum andfrom the two upper drums to the central or intermediate drum, a portionof these latter tubes being submerged and the remaining portion abovethe water-level.

9. In a water-tube boiler, the combination with a central orintermediate drum, a lower drum and two upper drums, said outer drums intriangular relation with one another, of tiling extending diagonallyfrom the lower drum to the two upper drums, tubes connecting said drumsand located below said tiling, and horizontal tiling extending from thediagonal tiling to the central or intermediate drum.

10. In a water-tube boiler, the combination with a central orintermediate drum, a lower drum and two upper drums, said outerdrums intriangular relation with one another, of tiling extending diagonallyfromthe lower drum to the two upper drums, tubes connectin g said drumsand located below said tiling, horizontal tiling extending from thediagonal tiling to the central or intermediate drum and tubes leadingfrom the upper drums to the central or intermediate dru n1, said tubesconstitutin g a wall above the space between them and the tiling.

11. In a water-tube boiler, the combination with a central orintermediate drum, a lower drum and two upper drums, said outer drums intriangular relation with one another, of tiling extending diagonallyfrom the lower drum to the two upper drums, tubes connecting said drumsand located below the tiling, horizontal tiling extending from thediagonal tiling to the central or intermediate drum tubes leading fromthe upper drums to the central or intermediate drum, said tubesconstituting a wall above the space between them and the tiling, andtiling extending across Vertically at the rear of the furnace andclosing the space above the horizontal tiling and between it and theupper drums.

12. In a water-tube boiler, the combination with a casing, of afeed-pipe bent back and forth in parallel arrangement across fromopposite points within the casing to form one V row and then in similararrangement opposite the spaces between the folds of the tubes inanother row'so that the tubes of the two rows interlock to form apractically solid water-back for the protection of the casing fromintense heat.

13. In a water-tube boiler, the combination PHILIP J. KEENE.-

In presence of LocKE PERFITT, W. H. PRATT.

